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Home >> Chevrolet >> 2002 >> Astro Van Passenger, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 827 (Automatic Transmission - 4L60-E/4L65-E (Service & Replacement)) >> Diagnostic Information and Procedures >> DTC P0503: Transmission Output Speed Drop >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step tests the VSS assembly circuit.
  2. 4. This step tests the integrity of the VSS assembly.
Fig 1: DTC P0503 Diagnosis (Steps 1-8)
G01565687Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P0503 Diagnosis (Steps 9-16)
G01565688Courtesy of GENERAL MOTORS CORP.
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